CVE-2021-33578
📋 TL;DR
CVE-2021-33578 is a critical SQL injection vulnerability in Echo ShareCare 8.15.5 that allows both authenticated and unauthenticated attackers to execute arbitrary SQL commands. This enables authentication bypass, data exfiltration, and database manipulation. Organizations using Echo ShareCare 8.15.5 are affected.
💻 Affected Systems
- Echo ShareCare
📦 What is this software?
Sharecare by Echobh
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise including full database access, credential theft, data destruction, and potential lateral movement to connected systems.
Likely Case
Data exfiltration of sensitive healthcare information, authentication bypass to gain unauthorized access, and potential data manipulation.
If Mitigated
Limited impact with proper input validation, parameterized queries, and network segmentation preventing successful exploitation.
🎯 Exploit Status
SQL injection vulnerabilities are well-understood with many available exploitation tools and techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.15.6 or later
Vendor Advisory: https://github.com/atredispartners/advisories/blob/master/ATREDIS-2021-0001.md
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Download and install Echo ShareCare version 8.15.6 or later from official vendor sources. 3. Restart the application services. 4. Verify the update was successful.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block malicious requests.
Network Segmentation
allRestrict access to Echo ShareCare to only authorized users and networks.
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries in application code
- Deploy database monitoring and alerting for suspicious SQL queries
🔍 How to Verify
Check if Vulnerable:
Check if running Echo ShareCare version 8.15.5 via application admin interface or version files.Check Version:
Check application admin panel or consult vendor documentation for version checking.Verify Fix Applied:
Confirm installation of version 8.15.6 or later and test SQL injection attempts are properly blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns
- Failed authentication attempts followed by successful access
- Database error messages in application logs
Network Indicators:
- SQL keywords in HTTP requests (SELECT, UNION, INSERT, etc.)
- Unusual database connection patterns
SIEM Query:
source="web_logs" AND ("SELECT" OR "UNION" OR "INSERT" OR "DELETE") AND status=200